package org.apache.maven.artifact.resolver.filter;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * Filter to only retain objects in the given artifactScope or better.
 *
 * @author <a href="mailto:brett@apache.org">Brett Porter</a>
 */
public class ScopeArtifactFilter extends AbstractScopeArtifactFilter {

  private final String scope;

  public ScopeArtifactFilter(String scope) {
    this.scope = scope;

    addScopeInternal(scope);
  }

  public String getScope() {
    return scope;
  }

  @Override
  public int hashCode() {
    int hash = 17;

    hash = hash * 31 + (scope != null ? scope.hashCode() : 0);

    return hash;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }

    if (!(obj instanceof ScopeArtifactFilter)) {
      return false;
    }

    ScopeArtifactFilter other = (ScopeArtifactFilter) obj;

    return equals(scope, other.scope);
  }

  private static <T> boolean equals(T str1, T str2) {
    return str1 != null ? str1.equals(str2) : str2 == null;
  }

}
